It is Boxer/NonCorrosive. Quality may be suspect on that era OFV mfg. The 1970s production is OK as the line was set up by Winchester/Olin I'm that decade and some QC people/procedures seem to be in place.

The 1990s and later OFV imported is REAL BAD ammo. I can not say for sure where your 1986 quality falls as all I shot was 1974-75 and no issues were noted.

Update, the OFV 86 is not very good, bad accuracy and the extraction rim on some of the cases was under sized.
I had a few rounds of OFV 77 and it was very good in accuracy and good brass.
All was boxer primed.